Brake for cycles



P. TOUCHAIS AND C. WAHL,Vv

I BRAKE Fon CYCLES.

APPLICATION FILED JUNE I. 1919.

mme@ im, 3, 1922.,

-fr SHEETS-SHEET I.

P. TOUCH/US AND C. WAHL.

BRAKE FOR CYCLES( APPLxc/mon FILED lum: 11. |919.

Patented Get. 3, 1922.

5 SHEETS-*SHEET 2 im www,

F. TOUCHAIS AND C. WAHL.

BRAKE FOR CYCLES. APPLICATION FILED IUNE II, 19'19.

Paented Oat. 3, H22.

5 SHEETS-SHEET 3 m aw IIIIIWFILII qll II I n P. TOUCHAS AND C. WHL. .BRAKE FR CYCLES. n WPHC/mon man jung 1:, 1919.

5 SHEETS-SHEET 4.

35 on line 6 6 of Fig. 2;

. -the -operating crank;

45 tion on the line 18--18 of I f crank,

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PIERRE 'revenais Anzo CHARLES WAHL, or raars, manon.

Baena ron CYCLES.

Application led .Tune 11,

To (IZ- whom t may concern.' v

Be it known that we, PIERRE ToUoHAs, and CHARLns WAHL, both citizens of the French Republic, residing at Parijs, inthe Department of Seine, the'French Republic,

have invented new and useful Improve ments in Brakes for Cycles, of which the following is a specification.

The present invention relates to brakes for cycles which are operated by -the chain when the pedals and cranks are forced in the opposite direction to the normal running ofthe machine. Duringthe forward movement of the machine, the pedals turn in clockwise direction, the top side of the chain beingl therefore under tension and therefore in a rectilinear direction. l

` By pressing on the pedals in the reverse direction, the"A normal play which is allowed to the chain, will permit the upper portion of the chain, owing to its weight, to sag and take the form of a curve, the chain will have therefore slightly dropped, its maximum drop being approximately near to the haliway distance between the axis of the pedal axle bracket and that ofA the rear wheel. Theprinciple 'of the braking action of this invention is based upon the suffi cient drop on lowering of the chain within the minimum play allowed thereto.

.In the drawing Figure 1 is' an elevation of the brake; Fig.V 2 shows .the j aws'of the brake; Figs. 3, 4 and 5 are sections of details; Fig. 6 is a section Fig. 7 isa section on line 7 -7 of Fig. 1 ;Fig. 8 is a plan view of Fi 9 is a section on the line 9 9 of Fig. 1; ig. 10 is an elevation of a modified form of construction; Fig.

4o 11 is a plan 4of same; Figs. 12, 13 and 14` show details; Fig. 15 is -a section on line 15-15 of Figure 1 1; Fig.-16 is a section on the line 16-16 of Fig-.15; Fig. i? is a plan View of the control lever; Fig. 18 is a sec- Fig. 10.; Fig. 19

is a plan' view of the control or operating toothed sector 2; the slotted member 1 which is disposed in the vertical plane of the chain,

. is secured by a bolt 1 to a support'., The

slotted member can -o'scillate and take variable inclned positions (its action caus- .455 ing the inclination-ofthe chain to val but Aalways remaining parallel'-to the chain.

191e. anni no. 303,521..

This position is ensured by the intermediary ofthe member lh which allovvsroi the adjustment of the slotted member 1. Themember 1b is held in'position by means of a screw 1.. adjustment slot' 1e 1b is provided.

The toothed -sector 2 around the ring 4 which is guided in a groovel 11 in the slotted member by. a bolt la to which is secured the control arm or crank 5.

On the toothed' sector 2 are mounted two bifurcated arms 6 free to turn about an axis 6, and whose extremities 6b receive a spindle 6c serving as connections for the ends. 7a of the lever 7. The fork is kept distanced from the lever 7 by means `of a roller 8.

The extremity 7b of the arm or lever 7 vwith which the member is fitted to a lug" 5 provided on the arm 5 where it can pivot freely. At the extremity 5" of the arm 5 is connected firstly the operating lever 9 and secondly the return' Said screw passes through an oscillates freely I The carriers 11, 12 oscillate freely on the axes ,11d and 12a provided on the members l, and the distance between the brake-shoes can be adjusted by displacing the pins 11 and 12 in the holes 1+i provided for the pur#- pose in the members l The members 14 are formed in one with the supports 3 which heid tbe brake and the controlling means to tlie cycle traine.

Figure 1 of the acconjipanying drawings which represents tbe forward movement,

. .shows that the chain being stretched does not touch of the surrounding members and that if at times it sliouid Sag. it would slip` on the teeth oi tbe toothed sector 2.

The actuating or engaging; mechanism 1s therefore completelj,vv independent of the its chain duringv tbe forward movement. li on the contrary', the movement of the pedals ils reversed, the upper portion of the chaiiiA sags and in its retrograde movement it will,

Carry with a the toothed secar 2 which, oltering no resistance, will oscillate and take `up the position represented in dot and dash linesin Fig. 1.

It will be readily understood that at this moment the roller 8 mounted on the pin 6, will press allthemore tightly upon the chain the more pressure, is applied to said roller, and that the toothed sector Will not go further along-sV Therefore, in continuing the l action on thdfpedals, the whole will be drawn rearwards With the chain, and arm 5v will then act upon the lever 9 which rotates the lever 17 through the intervention of the spindle 18. 2 l

. Inits pivotal movement, the lever 17, through the intervention of the links 15, 16, operates thebrake shoe-carriers 11, which take up the position for braking; the braking action will be the more'elt'ectivetaccording to eff rt exerted on the pedals'and this.

Without c using any appreciable fatigue.

When the forward movement of the pedals is resumed, the chain returns-the toothed sector to its original position while the spring 10 withdraws the brake blocks to their normal free position. If the iiha-inis o the reinforcedv roller type it is desirable to slightly round off the edges of tlieteeth of the toothed sector', this with the sole ob ject of causing them to engage morereadily with the successive rollers ot the chain sol as to slip into the next link.

K Figs. 10 to 19 show a modification in the construction of the brake and in which the toothed sector only has a single engaging tooth, the adjustment of the height being etl'ected by means of a cam Whose evolution is a circle, thereby allowing the sector to be raised or lowered to suit the diierent d1-' ameters of the Wheels and pinions. The seci tor can engage with any kind of chain iinmaterial ot' the tooth.

The variousmembers of this construction are similar to those described above except that the operating lever instead of being littcd on a square .is made integral with the shaft by means oi a toothed Washer which allows a perfect adjustment.

'l'he sector 2 is fitted with a tooth 2a which can mesh with the rollers ofthe chain no matter what may be the pitch thereof, the result obtained being the same as in case ot the toothed sector described With reference. to Figure l.

'ifh'e sector 2 is connected as shown in the pitch or size by reason ofits ypreceding example by an arm 6, to the biturcated arm 7 which is slightly modified as shown in Fig. 19 in order that the pull may take place in axis of the chain.

rlhe operating lever 9 is attached to the pin 18 'by means of a. toothed Washer 9 `Whose teeth engage with corresponding teeth provided for the purpose in'thellever 9.

The Washer 9a is screwed on to,"f'atthreaded portion 18. at the extremity of the pin 18.

This manner of mounting enables the operating lever to be exactly regulated since by simply displacing by one tooth in either the one or the other direction,

the angle of the operating lever 9 can be altered in relation to thev lever'operating the brake-shoe l carrier-arms.

The pin 18 is secured to the bicycle frame in th'e present form of construction by plates i 19H, 19h through which the pin 18 passes, by holes 19; on the plate 19?* rests the lever 9 which is held in place by a plate -19d and 19d are secured to the frame of the cycle :by means of bolts 19";

The ,carrier arms 11, 12.are articulated to the members 14 as above stated, .these members being held in the apertures 14* v arranged in the supports 3 which latter are connected to the frame tubes'by a simple tightening bolt 3B.

We claimzl. In .a brake for free wheel bicycles and the like, an, operating member consisting of a gear sector to be engaged by the links of of Vappropriate form. The three plates 19, 19".

the driving chain when hack pedaling, Varms on the said sector, on said arms to engage the saidv chain and to lock the same to .the sector ,bythe rotation of the sector,

means to. ypz"o duce thereby a longitudinal displacementxof the sector, and means to shoes into braking posltion y move the brake by the said longitudinal displacement, substantially as described.

2. A cycle-brake actuated by the driving meshes with theI chain when the pedals are reversed, arms depressed by the pivotal movement olsaid sector, and brake shoe carrying levers operated by said arms when the latter-are depressed, said levers being pivotally mounted and adjustable toward and from each other.

PIERRE TOUCH/US.

(lllAlililiS VVAl'll-i` lot regulating means foithe 

